Talking-machine.



J. A. RABBITT.

TALKING MACHINE.

APPLICATION FILED Plum, 1910.

Patented May 30, 1911.

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TALKING-MACHINE,

specification of Letters Patent.

Patented May 361 911,

Application filed February s, 1910. Serial No. 542,711.

T all whom it may concern:

, Be it known that T, JAMES A. RABBITT,

I a citizen of the United States, residing at Yokohama, in the Empire of Japan, have invented certain new and useful Tmprovements in Talking-Machines, of which the following is a specification.

This invention relates to talking machines and has reference morev particularly to the construction of the sound-conveying and amplifying devices for such machines.

The invention is directed to the provision of a talking machine of an improved construction, whereby a more compact structure and one which is of attractive appearance is provided, and such that an increased volume and a sweeter tone of the reproduced sounds are secured.

In accordance with the invention, the reproduced sounds are carried from the' sound-box through a passageway which passes through the box or casin employed as a support and an inclosure for the motor; within the casing the sound-conveying passageway is divided into two diverging parts which pass one on either side of the motor, thus forming a double resonance chamber. Each of these parts is of progressively increasing cross-sectional area, so that the sounds are amplified while passing therethrough. In this way a tapering sound-conveyer is provided which is of sufiicient size to efi'ect a substantial amplification of the sound, the employment of a bulky tapering horn extending above the machine is avoided, and ample space for the motor is provided without undue enlargement of the casing of the machine.

The invention further involves the provision of certain resonance devices in the sound-conveying passage which serve to augment the volume of the reproduced sounds and sweeten the tone, so that a more faithful reproduction of the recorded sounds is obtained.

In the preferred embodiment of the invention, a support is employed mounted in the sound-conveying passage and carrying resonators which maybe in the form of thin leaves, either metallic or non-metallic, increasing in width toward the end of the passage; the ends of these leaves or resonators are free of the walls of the passage and they vibrate in harmony with the sound waves thereby amplifying and improving the tone of the reproduced sounds.

'T have illustrated the preferred embodiment of my invention in the accompanying drawings, in which- Figure 1 is an elevation of 'a talking-machine, broken away and sectioned in part, Fig, 2 is a top view of the machine, Figs. 3 and 4: are detail views in section on lines 33 and il of Fig. 2, respectively, and Fig. 5 isa detail view of the mounting for the tone-arm.

Referring to these drawings, 1 indicates the casing of the machine, this being of the usual boxlike form. Within the casing is the motor, indicated at 2, this being arranged in the usual or any suitable manner to drive a vertical shaft extending through the top of the casing and carrying a turn table 3 adapted to support a sound-record of disk form. The sound-box 4c is mounted upon the free end of the tone-arm 5 with its stylus 6 adapted to track in the groove of the record on the turntable 3. The tone-arm 5 is mounted for both horizontal and vertical movement upon a tubular member 7 secured to and extending within the casingof the machine. The means for supporting the tone-arm thus is shown in detall in Fig. 5. The end of the tone-arm is pivotally connected by horizontally disposed pivot-pins 8 to a ring 9 which is adapted to move circumferentially between the top of the member 7 and a collar 10 threaded thereon.

Within the casing 1 of the machine, the member 7 is enlarged and is divided to form two passageways as shown at 11, one at substantially a right angle to the other and both extending from the top to the bottom of the casing. Each of these two passageways of the member 7 is extended to the side of the machine opposite it by walls 12, 13, 1d and 15 arranged vertically between the top and bottom of the casing 1, so that two passageways for the soundwaves are provided from the member 7 through the casing to the distant sides of the latter. The walls 12 and 15 are substantially parallel to two adjacent sides of the casing or those sides of the casing may be utilized to form the walls of the sound passages; and the walls 13 and 14 silo the two sound passageways area to 18 and lit will be considerably amplified, that this soundio conveyor extends through the casing of the mac no, and at the taper of the convc er is gectionably inc made so iciently great Without obasing the size the casing while leavin ample space for the motor. .LLH each of the branches of the sound-conveyor Within the casing l is support or renceeboard l6 extending lengthwise or assage and disposed in a vertical plane. h se boards supports plurality of brating resonators l7, preterby saving slots cut therein through resonators extend. The ends of resonators in proximity to the 7 or the passages but do not touch, as i in l, the resonators are inreased in as the Width of the pasin eases. The resonators are prefrranged as shown in 8, from lch "will be seen that in each passage are number of sets of the resonators, those of each set being arranged one above another and slightly curved in the direction the length or the passage, the curvature of each set being opposite to that of the adjacent sets,

W hen the reproduced sounds pass througl'i the sound-conveyer, they cause the free ends of the resonators 1? to vibrate in harmony With them and in practice 1 have found that all this affects both the volume and the quality of the reproduced sounds by increasing the volume and sweetening and clarifying the tone.

Having now described my invention, "What I claim as new therein and desire to secure by Letters Patent is as follows 1. A talking-machine comprising a rectangular casing, a motor therein, a turntable above the top of the casing driven by the motor, a tone-arm pivotally mounted at one corner of the top of the casing, asound hon carried by the tone-arm and adapted to coact with a record on the turntable, and a sound-conveyor leading from said tone-arm Within the casing, said conveyor being divided Within the casing to form two branches extending along the sides of the casing adjacent to the corner Where the tonearm is mounted and having their exits at the sides opposite, substantially as set forth.

2. A. talking-machine comprising a motor, a turntable driven thereby, a sound-box adapted to coact With a record on said turntable, a sound-conveyor to "which the sound- Walls 12 and i5, respeebox is connected, and a plurality of resonators supported intermediate their ends Within the sound-conveyor and having their ends disconnectea from the sound-conveyer so as to be free to vibrate in harmony With the sound-Waves, substantially as set forth.

3. A talking-machine comprisinga motor, a turntable driven thereby, sound-box adapted to coact with a record on said turntable, a sound-conveyor to which the soundbox is connected, and a plurality of thin resonators mounted Within the sound-con veyer, curved in the direction of the l ngth or the sound conveyor having their ends free to vibrate in harmony lvith the sound Waves, substantially as set forth.

a. A talking-machine comprising a motor, a turntable driven thereby, a sound-boa: adapted to coact with record on said turntable, a tapering Soundconveyer to which sound-box is connected, and a plurality of resonators mounted Within the sound-conveyer increasing in -Width toward the end; of the conveyor and having their ends tree to vibrate in harmony v h the sound Waves, substantially as set :torth.

5. A talking-machine comprising motor, a turntable driven thereby, a sound-box adapted to coact with a record on turntable, a sound-conveyer to which the sound box is connected, and plurality oi sets or resonators mounted Within sound-conveyer and having their ends tree to vibrate in harmony with the sound-Waves, adjacent sets of said resonators being oppositely curved in the direction of the length or" the conveyor, substantially asset forth.

6. A talking-machine comprising a motor, a turntable driven thereby, a sound-box adapted to coact with a record on said turntable, a tapering sound-conveyer to which the sound-box is connected, and plurality of sets or" resonators mounted "within the sound-conveyor, having their ends free to vibrate in harmony With the sound-Waves and increasing in Width toward the end of the conveyor, adjacent sets of said resonators being oppositely curved in the direction of the length 01 the conveyor, substantially as set forth.

'1. A talking-machine comprising a motor, a turntable driven thereby, a sound-box adapted to coact with a record on said turntable, a sound-conveyor to which the sound box is connected, a support Within the soundconveyer, and a plurality of thin resonators extending through openings in said support across the sound conveyer and having both ends thereof tree to vibrate in harmony with the soundwaves, substantially as set forth.

8. A talking-machine comprising a motor, a turntable driven thereby, a sound-box adapted to coast with a record on said turntable, a tapering sound-conveyor to "which the sound-box is connected, a support within the direction of the length of the conin the sound-conveyer, and a plurality of veyer, substantially as set forth. 10 sets of thin resonators extending through This specification signed and witnessed openings in said support,- having both their this 22nd day of December, 1909.

ends free to vibrate in harmony with the JAMESALOYSIUS RABBITT. sound-waves and increasing in size toward Witnesses:

the end of the sound-conveyer, adjacent sets J. K. CALDWELL,

of said resonators being oppositely curved GENJI KURIBARA. 

